LM3557
www.ti.com
SNVS338B – NOVEMBER 2004 – REVISED FEBRUARY 2013
LM3557 Step-Up Converter for White LED Applications
Check for Samples: LM3557
FEATURES
DESCRIPTION
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The LM3557 is a complete solution for white LED
drive applications. With minimal external component
count, no DC current leakage paths to ground, cycleby-cycle current limit protection, and output overvoltage protection circuitry, the LM3557 offer superior
performance and cost savings over standard DC/DC
boost component implementations.
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VIN Range: 2.7V–7.5V
Small External Components
1.25 MHz Constant-Switching Frequency
Output Over-Voltage Protection
Input Under-Voltage Protection
Cycle-By-Cycle Current Limit
TRUE SHUTDOWN: No DC current paths to
ground during shutdown
Low Profile Package:
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